浅析移动通信网垃圾短信的趋势和治理

通过挖掘目前四川联通移动通信网上的日常短信数据,分析垃圾短信的源头和趋势,建立了二维矢量模型并对大量群发号码进行过滤,尝试使用基于朴素贝叶斯算法的运营商策略和垃圾短信治理方案,在实际短信维护工作中取得了较好的效果。     

德莫林应用于白血病肛周感染患者的疗效观察

目的探讨德莫林（皮肤创面无机活性诱导敷料）治疗肛周感染的效果。方法将60例肛周感染患者随机分为2组观察组30例理疗加德莫林;对照组30例局部换药、理疗,比较两组疗效。结果观察组疗效明显优于对照组,两组比较差异有统计学意义（P〈0．01）。结论德莫林治疗肛周感染,有效提高了肛周感染的治愈率,减少患者痛苦。     

碱石灰玻璃表面长方形银纳米颗粒的制备与表征

采用离子交换结合热处理的方法在碱石灰玻璃表面制备了银纳米颗粒。通过紫外-可见分光光度计、X射线衍射仪、扫描电子显微镜对样品进行了表征。结果表明:热处理时,银离子在玻璃表面成核并生长成近似长方形的纳米颗粒。吸收光谱在416nm附近出现明显的银纳米颗粒表面等离子体共振吸收特征峰。     

Investigation of electrocoagulation reactor design parameters effect on the removal of cadmium from synthetic and phosphate industrial wastewater

This study investigates the effect of reactor design parameters on cadmium removal from industrial wastewater discharged by the Tunisian Chemical Group (TCG) to improve as much as possible efficiency and cost of electrocoagulation (EC) process. Based on an examination of the design parameters one by one, the best cadmium removal was achieved for an inter-electrode distance (d_ie) of 0.5 cm, monopolar connection mode, stirring speed of 300 rev min^?1, surface-area-to-volume ratio (S/V) of 13.6 m^?1, and an initial temperature of 50 °C. These operating conditions are allowed to achieve efficient removal in a relatively short operating time with the lowest energy consumption and cost possible. The present study proved that the parameters that have an effect on the operating cost are the electrode configuration, inter-electrode distance and S/V ratio. The energy consumption, the pH evolution, and the treatment cost were studied. The investigation of the effect of all the selected optimum EC design parameters together on the removal of cadmium from the TCG wastewater proved that the treatment was highly efficient; 100% of cadmium removal was reached in 5 min, with a very low power consumption (1.6 kW h m^?3) and very low cost (0.116 TND m^?3). Moreover, EC was found to be capable of removing cadmium as well as other pollutants at the same time from the case-study industrial wastewater. The investigation carried out in this work explores and proposes a very cost-effective treatment method to remove heavy metals from industrial wastewater if compared to results reported about cost of this treatment process through other widely used technologies such as coagulation (4.36 Tunisian National Dinar (TND) m^?3) and precipitation (9.96 TND m^?3) employed in previous studies.     

H-mode inductive coupling plasma for PVC surface treatment

An inductively coupled plasma machine has been modified to be able to apply working powers in the order of 1 kW, thus switching to the real inductive H-mode. The plasma is generated by applying a 13.56 MHz radio-frequency to a λ/4 antenna outside the plasma chamber in low pressure conditions. The working gas is argon at pressure in the range from 10 to 100 Pa. With this high power source we have been able to perform plasma etching on a poly(vinyl-chloride) (PVC) film. In particular the effect of the plasma is the selective removal of hydrogen and chlorine from the sample surface. The action of the high power plasma on the sample has been proved to be much more effective than that of the low power one. Results similar to those obtained with the low power machine at about 300 W for 120 min, have been obtained with the high power source at about 600 W for 30 min. The superficial generation of a conductive layer of double C=C bonds was obtained. The samples have been investigated by means of ATR spectroscopy, FIB/SEM microscopy and micro-electrical measurements, which revealed the change in charge conductivity.     

拉曼光谱在优化处理绿松石中的应用研究

优化处理绿松石的大量面市,给绿松石的鉴定带来了挑战。通过激光拉曼光谱测试分析、压制及人工注塑处理绿松石为研究对象,对优化处理绿松石的激光拉曼光谱特征进行了研究。结果表明,拉曼光谱技术是一种有效鉴别绿松石及其处理品的无损检测方法,OH,H₂O,PO₄ 及CH₂基团的振动模式和频率决定了优化处理绿松石的激光拉曼光谱特征。优化处理绿松石除具绿松石典型拉曼光谱特征外,在2 937和2 883 cm-1处普遍出现一组具鉴定意义的由外来添加物中CH₂伸缩振动及CH₂弯曲振动致拉曼谱带。依据这些特征拉曼谱带,有助于将天然绿松石与优化处理品区分开。该研究为快速、准确、无损鉴别绿松石提供了一种新思路。     

稳态强磁场实验装置水冷系统水耗分析及回用设计

稳态强磁场实验装置水冷系统主要用于带走大功率水冷磁体运行过程中所产生的热量. 为了防止水中的离子导电, 磁体循环冷却水采用去离子水, 因此水冷系统配备了10 m3/h 的去离子水制备系统及65 m3/h 的提纯系统, 以保障循环水水质的高稳定性. 磁体循环冷却水的热量通过板式换热器由低温冷冻水带走. 系统在纯水制备及提纯过程中存在排水量大, 排水水质高等特征, 而在冷冻水制备过程中则存在较高的冷却水蒸发损失. 本文结合系统特征对其各环节排水量及其水质等进行了分析, 得出了该类型水冷系统的水耗特征及系统日均水耗. 结合水质, 对纯水系统的主要排水进行了回用方案分析并通过计算得出了最大回用率.     

Nd:YAG激光在慢性咽炎治疗中的作用

目的:探讨Nd:YAG激光对慢性咽炎的治疗疗效。方法:对我院2004年-2005年12月间Nd:YAG激光治疗的慢性咽炎250例进行分析,并对激光与药物、手术等治疗方法分析。结果:慢性咽炎(增生型、且用药物治疗无效)激光治疗可以达到95%的治愈率,Nd:YAG激光治疗慢性咽炎的优点是:手术简便、病人痛苦小、疗效高、费用低、术后反应轻、并发症少等独特优点。     

Pharmacological agents that improve botulinum toxin efficacy in the treatment of spasmodic dysphonia

Botulinum toxin (botox) injection into the thyroarytenoid (TA) muscle is currently the most favored treatment for spasmodic dysphonia. However, results are often inconsistent. The purpose of this study was to identify a fast-acting neuromuscular blocking agent that could mimic botox effects to screen patients for therapy while still in the clinic. If the agent was noninteractive, it could also be injected coincidentally with botox and the resulting changes in voice used to predict the delayed effects due to botox. Evoked electromyography responses were recorded from the TA muscle in animal experiments to determine the time course for neuromuscular depression by botox and three fast-acting blocking agents: lidocaine, tubocurarine, and succinylcholine. Tubocurarine and succinylcholine proved to be suitable screening or predictor agents of botox efficacy, since they were reversible and mimicked botox action. In contrast, lidocaine produced irreversible effects.     

更改水箱控制方式,降低氮封装置氮气耗量

本文主要介绍了利用PLC对我厂纯水系统中水箱液位控制的改造，对其控制的原理、方式等内容进行了阐述。